Calculating returns and variability - You have observed the following returns on Harris' stock over the past five years: 17%, 18%, 26%-19%, and 19% What is the average real return on Harris' stock over this five year period? What was the variance of Harris' stock over this period? The standard deviation? a. b. What are the portfolio weights for a portfolio that has 115 shares of stock A that sell or $37 per share and 107 shares of stock B that sells for $44 per share